Description
Product Features
Certified to ANSI Z21.13 / CSA 4.9 Gas-fired Boiler Standard
Type 441 Stainless Steel Water Tube Heat Exchanger
ASME “H” stamped boiler, designed and constructed in compliance with the ASME Boiler and Pressure Vessel Code Section IV
Sealed cabinet High energy ignition transformer (spark ignition)
Built-in water pressure bypass (guarantees minimum water flow)
Low water pressure switch
Integrated ECM boiler circulator
Integrated 3-way valve (diverts between DHW & CH demands)
Integrated Condensate Trap
On / Off button
Two 120 VAC outputs for external circulators (DHW/CH)
DHW zone input (tank thermostat or sensor)
CH zone input x 2 (ON/OFF switch or NTI Room Sensor)
WiFi remote connectivity embedded
Outdoor temperature sensor input (or access weather via WiFi connection)
Control Features
Integral microprocessor safety control – flame safeguard and temperature
TEST Mode – for combustion setup
PURGE cycle – for air purging
AUTO function (outdoor/indoor reset) – resets boiler temperature depending on outdoor and/or room temperature
Adjustable reset curve (slope/parallel shift)
Adjustable reset temperature boost
Summer/Winter changeover (WWSD)
Integrated programmable T-stat x 2 (with optional NTI Room Sensors)
Freeze protection
Factory settings restore option
Cascade up to 8 TRX-series boilers
Adjustable ignition delay timer
Manual mode operation (pump/fan/diverter)
Boiler statistics
Lockout and error history
Optional 0-10V / 4-20mA input clip-in module
Optional NTI 3-Zone Pump/Valve Controller
Optional NTI Room Sensor
Specifications
AFUE: 96%
Heating Capacity (MBH): 79
Net AHRI Rating, Water (MBH): 69
Gas Supply Pressure: 3.5” to 10.5” WC
Power Supply: 120V, 60 Hz, less than 12A
Boiler Water Content (Gal): 1.1
Ignition System: Direct Electronic Spark Ignition / Flame Rectification
Burner System: Premixed Fuel Modulation / Stainless Steel Burner
Gas Valve System: Air Ratio Valve
Gas Connection, NPT: 3/4” (Male)
